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re PR tree-optimization/87746 (ICE in vect_update_misalignment_for_peel, at tree-vect-data-refs.c:1035) 

2018-10-26  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/87746
	* tree-vect-data-refs.c (vect_update_misalignment_for_peel):
	Simplify and fix WRT strided store groups with size not
	equal to step in element count.
	(vect_analyze_group_access_1): Dump the whole group.

	* gcc.dg/pr87746.c: New testcase.

From-SVN: r265517
This commit is contained in:
Richard Biener 2018-10-26 07:12:02 +00:00 committed by Richard Biener
parent 682f212a90
commit 7ea4b8ed7b
4 changed files with 55 additions and 20 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2018-10-26 Richard Biener <rguenther@suse.de>
PR tree-optimization/87746
* tree-vect-data-refs.c (vect_update_misalignment_for_peel):
Simplify and fix WRT strided store groups with size not
equal to step in element count.
(vect_analyze_group_access_1): Dump the whole group.
2018-10-25 Carl Love <cel@us.ibm.com>
* config/rs6000/rs6000-c.c (P9V_BUILTIN_VEC_VSCEDPGT,

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2018-10-26 Richard Biener <rguenther@suse.de>
PR tree-optimization/87746
* gcc.dg/pr87746.c: New testcase.
2018-10-26 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* gcc.dg/pr78973-2.c: Remove xfail on dg-warning.

23
gcc/testsuite/gcc.dg/pr87746.c Normal file
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@ -0,0 +1,23 @@
/* { dg-do compile } */
/* { dg-options "-Ofast" } */
/* { dg-additional-options "-mavx2" { target x86_64-*-* i?86-*-* } } */
typedef struct rtx_def *rtx;
struct replacement {
rtx *where;
rtx *subreg_loc;
int mode;
};
static struct replacement replacements[150];
void move_replacements (rtx *x, rtx *y, int n_replacements)
{
int i;
for (i = 0; i < n_replacements; i++)
if (replacements[i].subreg_loc == x)
replacements[i].subreg_loc = y;
else if (replacements[i].where == x)
{
replacements[i].where = y;
replacements[i].subreg_loc = 0;
}
}

39
gcc/tree-vect-data-refs.c
View File

@ -1010,20 +1010,10 @@ vect_update_misalignment_for_peel (dr_vec_info *dr_info,
unsigned int i;
vec<dr_p> same_aligned_drs;
struct data_reference *current_dr;
int dr_size = vect_get_scalar_dr_size (dr_info);
int dr_peel_size = vect_get_scalar_dr_size (dr_peel_info);
stmt_vec_info stmt_info = dr_info->stmt;
stmt_vec_info peel_stmt_info = dr_peel_info->stmt;
/* For interleaved data accesses the step in the loop must be multiplied by
the size of the interleaving group. */
if (STMT_VINFO_GROUPED_ACCESS (stmt_info))
dr_size *= DR_GROUP_SIZE (DR_GROUP_FIRST_ELEMENT (stmt_info));
if (STMT_VINFO_GROUPED_ACCESS (peel_stmt_info))
dr_peel_size *= DR_GROUP_SIZE (peel_stmt_info);
/* It can be assumed that the data refs with the same alignment as dr_peel
are aligned in the vector loop. */
/* It can be assumed that if dr_info has the same alignment as dr_peel,
it is aligned in the vector loop. */
same_aligned_drs = STMT_VINFO_SAME_ALIGN_REFS (peel_stmt_info);
FOR_EACH_VEC_ELT (same_aligned_drs, i, current_dr)
{
@ -1031,8 +1021,8 @@ vect_update_misalignment_for_peel (dr_vec_info *dr_info,
continue;
gcc_assert (!known_alignment_for_access_p (dr_info)
|| !known_alignment_for_access_p (dr_peel_info)
|| (DR_MISALIGNMENT (dr_info) / dr_size
== DR_MISALIGNMENT (dr_peel_info) / dr_peel_size));
|| (DR_MISALIGNMENT (dr_info)
== DR_MISALIGNMENT (dr_peel_info)));
SET_DR_MISALIGNMENT (dr_info, 0);
return;
}
@ -1040,10 +1030,8 @@ vect_update_misalignment_for_peel (dr_vec_info *dr_info,
if (known_alignment_for_access_p (dr_info)
&& known_alignment_for_access_p (dr_peel_info))
{
bool negative = tree_int_cst_compare (DR_STEP (dr_info->dr),
size_zero_node) < 0;
int misal = DR_MISALIGNMENT (dr_info);
misal += negative ? -npeel * dr_size : npeel * dr_size;
misal += npeel * TREE_INT_CST_LOW (DR_STEP (dr_info->dr));
misal &= DR_TARGET_ALIGNMENT (dr_info) - 1;
SET_DR_MISALIGNMENT (dr_info, misal);
return;
@ -2559,11 +2547,22 @@ vect_analyze_group_access_1 (dr_vec_info *dr_info)
dump_printf (MSG_NOTE, "strided store ");
else
dump_printf (MSG_NOTE, "store ");
dump_printf (MSG_NOTE, "of size %u starting with %G",
(unsigned)groupsize, stmt_info->stmt);
dump_printf (MSG_NOTE, "of size %u\n",
(unsigned)groupsize);
dump_printf_loc (MSG_NOTE, vect_location, "\t%G", stmt_info->stmt);
next = DR_GROUP_NEXT_ELEMENT (stmt_info);
while (next)
{
if (DR_GROUP_GAP (next) != 1)
dump_printf_loc (MSG_NOTE, vect_location,
"\t<gap of %d elements>\n",
DR_GROUP_GAP (next) - 1);
dump_printf_loc (MSG_NOTE, vect_location, "\t%G", next->stmt);
next = DR_GROUP_NEXT_ELEMENT (next);
}
if (DR_GROUP_GAP (stmt_info) != 0)
dump_printf_loc (MSG_NOTE, vect_location,
"There is a gap of %u elements after the group\n",
"\t<gap of %d elements>\n",
DR_GROUP_GAP (stmt_info));
}